EP0087909B1 - Respirator air guide - Google Patents

Respirator air guide Download PDF

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Publication number
EP0087909B1
EP0087909B1 EP83300911A EP83300911A EP0087909B1 EP 0087909 B1 EP0087909 B1 EP 0087909B1 EP 83300911 A EP83300911 A EP 83300911A EP 83300911 A EP83300911 A EP 83300911A EP 0087909 B1 EP0087909 B1 EP 0087909B1
Authority
EP
European Patent Office
Prior art keywords
face
air
piece
respirator
air guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83300911A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0087909A2 (en
EP0087909A3 (en
Inventor
Cyril Nelson Edward Angell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Avon Industrial Polymers Ltd
Original Assignee
Avon Industrial Polymers Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avon Industrial Polymers Ltd filed Critical Avon Industrial Polymers Ltd
Publication of EP0087909A2 publication Critical patent/EP0087909A2/en
Publication of EP0087909A3 publication Critical patent/EP0087909A3/en
Application granted granted Critical
Publication of EP0087909B1 publication Critical patent/EP0087909B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices

Definitions

  • the present invention relates to a respirator, for use e.g in hostile environments where it is important that air drawn into the face piece of the respirator is free from harmful or pathogenic substances.
  • the respirator has an air guide in the face piece to control the flow of air therein.
  • Such an air guide takes the form of an assymetric shield extending between the inlet orifices and inner surfaces of the face-piece so that air drawn through the inlet orifice(s) to the face-piece has to pass around the air guide to reach the face of the user.
  • the known air guides do not provide sufficient symmetry of flow, so that cold air drawn into the face-piece passes preferentially over one eye of the user rather than the other thereby affecting vision.
  • An alternative in the prior art has involved the moulding of a closed duct into the thickness of the face-piece, something which presents great manufacturing problem.
  • the present respirator by contrast to that seen in DE-C-1097281 differs by the features stated in the second part of claim 1. It has an air inlet at one side or other of the median plane of the respirator and ridges act to define air passages between the face piece and air guide to equalise and guide the air flow from the inlet to both eyepieces.
  • the ridges act as vanes to control the direction of air flow over the guide and can' be provided on the outer surface of the guide itself and/or on the inner surface of the face-piece, between the face-piece and the guide.
  • vanes enables the air guide to be made symmetric and yet provide substantially symmetrical air flow in a respirator with an inlet orifice in an assymetric position.
  • the respirator with two orifices, located on opposite sides of the face-piece can be such that a filter canister is attached to one of the orifices is used depending on the "handedness" of the user.
  • the other orifice may be used to house a secondary speech outlet assembly, the primary speech outlet being provided by a guide on the front of the respirator. This enables a single configuration of respirator face-piece to be used by all, rather than it being necessary to produce left-handed and right-handed respirators, for different users.
  • the ridges may be shaped so that they provide a number of rectangular air channels extending substantially upwards in the mask. It is believed that such channels act as an impedance to the air passing over the guide,'so that air drawn through the inlet towards the mouth passes uniformly through each channel. In this way symmetry of airflow is established.
  • top of the guide it is possible to shape the top of the guide so that it directs air away from the face of the user and onto the lenses of the face-piece. This creates a flow of air over the lenses which reduces misting.
  • an air guide 10 for a respirator comprises a generally triangular member shaped to accommodate the lower part of the human face.
  • the member is generally triangular or shield-shaped in front view and is symmetrical about its center line on which is also centred an aperture 12.
  • the edge of the aperture 12 is secured to the outlet orifice of the respirator, over which extends a grill which also serves as the primary speech outlet of the respirator.
  • the face-piece (not shown) of the respirator contacts the air guide along its edge surfaces 11 and 13 leaving a gap between itself and the face-piece between those edges and also along the upper edge 14 of the guide and the adjacent portion of the face-piece.
  • Side view Figure 2
  • the air guide can be seen to have a forwardly projecting part defining the aperture 12 and an inclined upper surface 23 fitting over the nose of the wearer.
  • Ridges 15 are provided on the outer surface 14 of the guide between the aperture 12 and the upper surface 14 of the guide 10. They coact with the inner surface of the face-piece, maintaining the spacing of the air guide from the face-piece and are shaped to provide approximately rectangular channels for air along the outer surface of the guide 10. They may be formed by moulding them integrally with the guide 10.
  • the face-piece is provided with orifices 16, 17 on the right hand side and the left hand side.
  • a canister containing air-purifying material is attached to the face-piece at one of these orifices (16,17).
  • the other orifice receives an insert to act as a secondary speech outlet.
  • the vanes 15 may also assist in maintaining uniform spacing between the guide 10 and the face-piece. This feature is not provided by the standard air guides and which may move relative to the face-piece thereby causing the incoming air to flow in an unpredictable way. It is thought that this unpredictable flow is one of the reasons why standard respirators have assymetric airflow within the face-piece, and the present invention seek to overcome this.
  • the air guide 10 and ridges in the region adajcent the upperedge 14 of the guide 10 have curved portions 20 angled away from the face of the user and towards lenses 21 mounted in the face-piece. As shown by the arrows 22 an air flow is created along the inner surfaces of the lenses 21 and this helps to prevent misting of the lenses 21. The air then passes downwards to the user through aperture 24. Exhaled air is expelled at 25 via aperture 12 to an outlet grill. It is also possible to provide vanes on the inner surface of the face-piece adjacent the lenses 21 which acts as an additional means of guiding air over the lens surfaces.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
EP83300911A 1982-02-26 1983-02-22 Respirator air guide Expired EP0087909B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8205716 1982-02-26
GB8205716 1982-02-26

Publications (3)

Publication Number Publication Date
EP0087909A2 EP0087909A2 (en) 1983-09-07
EP0087909A3 EP0087909A3 (en) 1984-03-21
EP0087909B1 true EP0087909B1 (en) 1987-06-24

Family

ID=10528638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83300911A Expired EP0087909B1 (en) 1982-02-26 1983-02-22 Respirator air guide

Country Status (13)

Country Link
US (1) US4881538A (no)
EP (1) EP0087909B1 (no)
JP (1) JPS58198355A (no)
KR (1) KR890000137B1 (no)
AU (1) AU553005B2 (no)
CA (1) CA1198959A (no)
DE (1) DE3372180D1 (no)
DK (1) DK156458C (no)
FI (1) FI74615C (no)
GB (1) GB2115293B (no)
MY (1) MY8600421A (no)
NO (1) NO158850C (no)
YU (1) YU45383A (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023079272A1 (en) * 2021-11-04 2023-05-11 Dyson Technology Limited Wearable air purifier

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4764990A (en) * 1986-12-31 1988-08-23 Markert Allan R Ventilated face shield
US5181506A (en) * 1991-05-02 1993-01-26 The United States Of America As Represented By The Secretary Of The Army Multilayer protective gas mask
FI101198B (fi) * 1992-03-02 1998-05-15 Kemira Oy Kaasunaamari
NO921853D0 (no) * 1992-05-11 1992-05-11 Iver Hansen Luftrenser
DE4240626C1 (de) * 1992-12-03 1994-03-24 Draegerwerk Ag Atemschutzmaske mit festem Maskenkörper
USD378610S (en) * 1995-10-27 1997-03-25 Minnesota Mining And Manufacturing Company Full face respirator
US5924420A (en) * 1996-09-24 1999-07-20 Minnesota Mining And Manufacturing Company Full face respirator mask having integral connectors disposed in lens area
USD409744S (en) * 1997-03-05 1999-05-11 Minnesota Mining And Manufacturing Company Full face respirator lens
USD426298S (en) * 1998-07-20 2000-06-06 3M Innovative Properties Company Full-face respirator lens
US6701925B1 (en) 2002-04-11 2004-03-09 Todd A. Resnick Protective hood respirator
US7523750B2 (en) * 2003-11-12 2009-04-28 Krzysztofik J Mario Breathing respirator
CN102440456B (zh) * 2010-10-13 2013-10-16 周俊宇 鼻罩
CA2827077C (en) 2011-02-11 2016-03-29 Lg Electronics Inc. Gas oven
KR102155376B1 (ko) * 2018-07-18 2020-09-11 조욱래 산소공급장치
KR102308742B1 (ko) * 2019-11-15 2021-10-05 김성환 웨어러블 머플러형 공기청정기
KR102444763B1 (ko) * 2020-07-01 2022-09-19 홍석환 입김배출패드가 구비된 김서림 방지형 방진 마스크
KR102495141B1 (ko) * 2021-08-24 2023-02-06 김제훈 공기유동을 따른 편안한 호흡이 가능한 안면 마스크장치

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821192A (en) * 1958-01-28 Monro
US1410927A (en) * 1920-05-22 1922-03-28 American La France Fire Engine Respirator mask
US1762695A (en) * 1924-05-14 1930-06-10 Monro Randolph Gas mask
GB312594A (en) * 1928-02-28 1929-05-28 Fordyce Charles Jones Improvements relating to respiratory gas masks or face pieces
FR802211A (fr) * 1935-05-15 1936-08-31 Dispositif antibuée pour masques à gaz
GB480473A (en) * 1935-12-24 1938-02-23 Horak Vaclav Improvements in or relating to gas masks
FR835209A (fr) * 1937-09-02 1938-12-15 Masque contre les gaz nocifs avec dispositif anti-buée
US2308991A (en) * 1940-11-27 1943-01-19 Melup Solomon Gas mask
US2365779A (en) * 1941-12-01 1944-12-26 Martin C Schwab Gas mask
DE1028887B (de) * 1955-08-04 1958-04-24 Dr Hugo Stoltzenberg Atemschutzmaske, vorzugsweise Vollblickmaske, mit einer Klarscheibe
US2835250A (en) * 1956-07-30 1958-05-20 Mine Safety Appliances Co Mask for breathing apparatus
FR1175868A (fr) * 1957-06-03 1959-04-02 France Etat Perfectionnements apportés aux masques respiratoires
US3118445A (en) * 1958-12-22 1964-01-21 Forsvarets A B C Direktorat Arrangement relating to gas masks
US3181531A (en) * 1960-04-01 1965-05-04 Pirelli Rubber gas mask
US3227159A (en) * 1960-11-08 1966-01-04 Ministero Della Difesa Esercit Mask for the protection against poison gases
US3667460A (en) * 1967-05-08 1972-06-06 Ilc Ind Inc Ventilation system for inflatable pressure garments
US3572332A (en) * 1969-04-29 1971-03-23 Mine Safety Appliances Co Combination valve and speaking diaphragm unit
US3516404A (en) * 1969-09-09 1970-06-23 Nasa Biological isolation garment
US3657740A (en) * 1969-11-26 1972-04-18 Armando A Cialone Ventilated welder{3 s mask assembly
IT1070735B (it) * 1976-10-04 1985-04-02 Pirelli Miglioramenti nei dispositivi per la protezione del capo e delle vie respiratorie
CA1123705A (en) * 1979-09-28 1982-05-18 Her Majesty The Queen, In Right Of Canada, As Represented By The Minister Of National Defence Respirator speech unit/outlet valve
US4433684A (en) * 1981-03-18 1984-02-28 Survival Technology, Inc. Assembly for administering respiratory medicament dosage through a gas mask
US4595003A (en) * 1983-10-21 1986-06-17 The United States Of America As Represented By The Secretary Of The Army Protective mask for airborne toxic substances
US4764990A (en) * 1986-12-31 1988-08-23 Markert Allan R Ventilated face shield

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023079272A1 (en) * 2021-11-04 2023-05-11 Dyson Technology Limited Wearable air purifier

Also Published As

Publication number Publication date
CA1198959A (en) 1986-01-07
DE3372180D1 (en) 1987-07-30
DK94383A (da) 1983-08-27
KR890000137B1 (ko) 1989-03-08
DK156458C (da) 1990-01-15
GB2115293A (en) 1983-09-07
EP0087909A2 (en) 1983-09-07
GB2115293B (en) 1985-10-02
FI74615C (fi) 1988-03-10
AU553005B2 (en) 1986-06-26
DK156458B (da) 1989-08-28
FI830633A0 (fi) 1983-02-25
NO158850B (no) 1988-08-01
AU1187283A (en) 1983-09-01
YU45383A (en) 1986-06-30
FI830633L (fi) 1983-08-27
JPS58198355A (ja) 1983-11-18
KR840003426A (ko) 1984-09-08
EP0087909A3 (en) 1984-03-21
DK94383D0 (da) 1983-02-25
MY8600421A (en) 1986-12-31
FI74615B (fi) 1987-11-30
US4881538A (en) 1989-11-21
GB8304911D0 (en) 1983-03-23
NO830677L (no) 1983-08-29
NO158850C (no) 1988-11-09

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